电极用纳米Ag_2O的电化学性能研究Ⅲ.电极的循环伏安行为  

The Electrochemical Properties of Nanophase Ag_2O as the Active Electrode Material Ⅲ. Cyclic Voltammetric Behavior

作　　者：刘洪涛[1] 夏熙[1] 

机构地区：[1]新疆大学应用化学研究所,乌鲁木齐830046

出　　处：《应用化学》2002年第5期441-445,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金资助项目 (2 9963 0 0 2 )

摘　　要：研究了 3种具有不同组成的氧化银 ( )电极在 2种不同扫速条件下的循环伏安 (CV)行为 ,发现在较慢扫速 (0 .5 m V/s)条件下 ,不同组成电极的峰形相差较大 .各电极的峰电流值都呈现出明显的差异 ,即具有合适配比的混配电极展示出良好的循环可逆性能 ,而纯纳米粒子组成的电极接受电荷的能力明显较弱 .对于各电极峰位的偏移及峰电流的涨消做了对比解析 ,表明最佳混配电极中的电活性粒子具有合理的分布 ,电极极化小 ,活性物质利用率高 。The cyclic voltammetric(CV) behavior of silver oxide electrodes were investigated as function of scan rate and mass ratio of common Ag 2O( d =0 5 μm) and nano Ag 2O. The peak shapes in CV diagramms were differed for the three electrodes when the scan rate was 0 5 mV/s and their peak current values were obviously different at any scan rate. The optimum mixture electrode( sample A ) exhibited remarkable cyclic reversibility, while the pure nanophase Ag 2O electrode( sample F ) was wear in receiving charges. The common Ag 2O electrode(sample C) was just in between them. The best electrochemical property of the optimum mixture electrode could be due to the effectively reasonable distribution of the electroactive substances on the surface of electrode.

关 键 词：纳米氧化银 循环伏安 混配电极 循环可逆性 

分 类 号：O646.2[理学—物理化学]